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Physics · 2024 · 3 marks
CBSE 2024 · Region 1 · Set 1 · Q28
(a) State any two properties of a nucleus. (b) Why is the density of a nucleus much more than that of an atom? (c) Show that the density of the…
(a)
State any two properties of a nucleus.
(b)
Why is the density of a nucleus much more than that of an atom?
(c)
Show that the density of the nuclear matter is the same for all nuclei.
Marking-scheme solution
a) Stating two properties of a nucleus
b) Why density of a nucleus is much more than that of an atom
c) Showing that density of nuclear matter is same for all nuclei
(i) The nucleus is positively charged
(ii) The nucleus consists of protons and neutrons
(iii) The nuclear density is independent of mass number
(iv) The radius of the nucleus, \(\displaystyle \mathrm{R}=\mathrm{Ro} \mathrm{A}^{1 / 3}\)
(b)
Atoms have large amount of empty spaces. Mass is concentrated in nucleus.
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CBSE Class 12 Physics past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.